Unable to build project with "Enhanced Security" from Xcode26

[nosferatu500]

Description

When I enabled the “Enhanced Security” configuration in Xcode 26, I encountered an issue while attempting to build my project.

Reproducing the issue

• Open Xcode project settings with Xcode26
• Signing & Capabilities
• Click on +Capability
• Enhanced Security
• Try to build project

Firebase SDK Version

11.14.0

Xcode Version

26 beta 1

Installation Method

Swift Package Manager

Firebase Product(s)

Messaging

Targeted Platforms

iOS

Relevant Log Output

Undefined symbols for architecture arm64e:
  "_OBJC_CLASS_$_FIRApp", referenced from:
       in AppDelegate.o
  "_OBJC_CLASS_$_FIRMessaging", referenced from:
       in AppDelegate.o

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!